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Gabarron CMX15 - User Manual

Gabarron CMX15
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INSTALLATION INSTRUCTIONS
AND USER GUIDE
DIGITAL MODULATING ELECTRIC BOILERS &
ELECTRIC COMBI BOILERS
CMX15
CM15
FOR CENTRAL HEATING AND
DOMESTIC HOT WATER
Please read these instructions before installing or
using this appliance for the rst time
CMX15
CM15

Questions and Answers

  • J
    Joe MartinSep 8, 2025
    What to do if my Gabarron CMX15 Boiler shows Error E3 Lack of heating water flow?
    • K
      karen62Sep 8, 2025
      Error E3 means there is a lack of heating water flow. This could be because the pump is blocked – unblock it. Also, check if any valves are shut and open them. Another reason might be air in the installation, so purge the installation.
  • R
    rbartonSep 7, 2025
    What to do if my Gabarron Boiler shows Error E4 Overheating of the heating?
    • M
      Madison BrownSep 7, 2025
      Error E4 indicates overheating, which may be due to a blocked pump. Unblock the pump. Alternatively, check if any valves are shut and open them. Air in the installation can also cause this, so purge the installation.
  • D
    Dana SanchezAug 22, 2025
    How to fix Gabarron CMX15 Boiler that will not start?
    • H
      Heather CastanedaAug 22, 2025
      If your Gabarron Boiler won't start, there could be several reasons. First, ensure the boiler is receiving power by checking the incoming power supply. Also, verify that the boiler control switch is turned on. If the heating system overheated, the switch may have tripped; locate and reset it. The same applies to DHW overheat. Lastly, if the DHW tank is empty, open a hot water tap until water flows.
  • J
    Joshua BlackSep 4, 2025
    What does fault E5 mean on a Gabarron Boiler?
    • M
      Michael GonzalezSep 4, 2025
      If your Gabarron Boiler displays fault E5, it indicates an error in the configuration for maximum heat output. You should check the correct configuration.
  • B
    Brittany OlsonSep 3, 2025
    What does fault E6 on my Gabarron Boiler mean?
    • M
      michaelgarciaSep 3, 2025
      If your Gabarron Boiler displays fault E6, it indicates a problem with the DHW temperature sensor. Check the connections. If necessary, replace the sensor.
  • S
    Sherri FletcherSep 2, 2025
    Why is my Gabarron CMX15 Boiler heating temperature so low?
    • C
      Carlos WongSep 2, 2025
      If your Gabarron Boiler is producing low heating temperature, first check the temperature and output settings to ensure they are appropriately configured. Also, check the heating elements and replace if necessary. Finally, it's possible the heat requirements were miscalculated; recalculate and configure accordingly.
  • M
    Michael KramerAug 31, 2025
    What does it mean if Gabarron Boiler displays fault E3 and system resistance is too high?
    • C
      Christopher LittleAug 31, 2025
      If your Gabarron Boiler displays fault E3, and it continues, the system resistance might be too high or there could be a blockage. Verify pump speed 3, check pump duty, open all radiator valves, and install a system by-pass.
  • L
    Laura RamirezAug 30, 2025
    What does it mean if Gabarron CMX15 displays fault E3 and there is air in the system?
    • K
      kpayneAug 30, 2025
      If your Gabarron Boiler displays fault E3, and it continues, there might be air in the system. Purge the system thoroughly. Check that the automatic air valve is open. Vent the pump.
  • K
    kaitlyn50Aug 29, 2025
    What does it mean if Gabarron Boiler displays fault E3 and the pump is not turning?
    • C
      Curtis HancockAug 29, 2025
      If your Gabarron Boiler displays fault E3, and it continues, the pump may not be turning. Check that it is rotating freely. If necessary, replace the pump.
  • P
    Peter JordanAug 27, 2025
    What to do if the buttons on my Gabarron CMX15 do not respond?
    • K
      Kevin WarrenAug 27, 2025
      If the buttons on your Gabarron Boiler do not respond, the control panel may be blocked. Consult Section 10.2 BLOCKING THE CONTROLS for instructions.

Summary

Introduction and Safety

General Safety Precautions

Essential safety guidelines for installation and operation, covering electrical and environmental hazards.

Installation Procedures

Boiler Siting

Ensure proper location, clearance, protection from moisture, and upright installation.

Electrical Power Supply & Wiring

Emphasizes safety, competency, supply capacity, and proper earthing for electrical connections.

Boiler Location

Guidance on siting the boiler, considering weight, environment, and accessibility.

Water Connection Details

Details hydraulic connections, filling loops, flow/return, drain points, system by-pass, and expansion.

DHW Discharge Pipe-Work Regulations

Requirements for discharge pipe-work from T&P relief valve as per Building Regulations.

Mains Electrical Connections

Covers impedance, service capacity, pre-connection checks, and power supply load capacity.

Commissioning

Limiting Boiler Maximum Output

Configures the boiler's maximum heat output via dip switches on the PCB.

Operating the Boiler

Initial Switching On Procedure

Critical steps before powering on, including output adjustment and system checks.

Troubleshooting

Common Faults and Solutions

Lists common problems, their potential causes, and recommended solutions for boiler issues.

Overheat Lock-Out and Resetting

Procedure to reset central heating and DHW overheat safety limit switches.

Flow Switch Error E3 and Bypass

Addresses E3 error due to low flow, its causes, and the need for system bypass.

Main Components

Maintenance and Care

Technical Data

Wiring Diagrams

Gabarron CMX15 Specifications

General IconGeneral
BrandGabarron
ModelCMX15
CategoryBoiler
LanguageEnglish

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